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Patent Searching and Data


Matches 301 - 350 out of 11,277

Document Document Title
WO/1991/007009A1
A unipolar motor control system includes motor current regulation derived from monitoring battery voltage and motor temperature. The monitored battery voltage and motor temperature are input to a microprocessor control which has one or m...  
WO/1990/015476A1
A driving system capable of producing large driving force to drive a load and positioning it rapidly with high accuracy by use of a controller capable of driving a motor at a high speed with high torque and high efficiency. When target p...  
WO/1990/001231A1
A motor is disclosed comprising a housing (5) and a plurality of parallel stator laminations (4) mounted on the interior wall of the housing surrounding the rotor (3). The stator (4) comprises a plurality of coils (28) wound around the s...  
WO/1989/008349A1
Two-state, bilateral, single-pole, double-throw, half-bridge power-switching apparatus capable of high speed, high current switching over a duty factor range of 0 % to 100 % includes a single-wire connector (104) to a source (101) of swi...  
WO/1989/007789A1
A digital follow-up system comprises a synchronous machine (1), on the shaft (2) of which is mounted a position pick-up (3) connected through its output (4) to a unit (6) for determining the code of the displacement angle between the act...  
WO/1989/007859A1
High resolution microstepping of a unipolar d.c. motor (18) is accomplished by applying from a look-up table the values of the SINE and COSINE of a given angle to the control circuit of a unipolar d.c. motor. The difference between the p...  
WO/1989/005539A1
In driving motors for continuous and positioning operation, two different types of rotor, corresponding to the type of operation, are controlled by two different stators. The driving motor (1) according to the invention is of simple desi...  
WO/1989/004085A1
A method and apparatus for controlling stepmotors (24, 124) having a broad range of applications including fuel control for gas-turbine engines, and operating powered automatically controlled doors (140) for mass transit vehicles is disc...  
WO/1988/008641A1
A control system for a stepping motor includes first and second pairs (W1, W2) of complementary windings. The windings are coupled via respective switching devices (T3-T6) to ground, a low voltage source is coupled via diodes (CR6, CR7) ...  
WO/1988/005185A1
An apparatus and method for operating a plurality of stepper motors (95). A controller operates a plurality of sequentially connected stepper motors (95) executing substantially the same motion. The apparatus includes an incremental cont...  
WO/1987/005755A1
A device for detecting the rotational position of the rotor of a motor, which is capable of detecting the absolute rotational position of the rotor shaft of the motor over one turn of the rotor shaft, and which is also capable of detecti...  
WO/1985/004269A1
A permanent magnetic stepper motor (10) apparatus which provides high constant torque and constant speed through a large stepping angle under varying output shaft load conditions. The apparatus includes a rotor (12), a plurality of stato...  
WO/1985/004061A1
A novel method of controlling a stepping motor comprises applying pulsed power (P1, P2) to one or two phases (1, 2) of the motor for variable pulse duration varied according to a programme in successive steps (P1, P2; P5, P3; P6, P4), th...  
WO/1985/000708A1
The method includes varying the width of the high level drive impulses of a bi-level drive system based on the desired speed to be achieved by the stepper motor. A microprocessor is used to vary the pulse width.  
WO/1984/003013A1
A "H" switching circuit (10) for providing current drive to a load coupled between first (20) and second (22) outputs thereof comprising first and second paired switching transistor circuits each including an upper transistor (12:16) tha...  
WO/1983/002695A1
A stepper motor control circuit includes a waveform generator circuit (301, 302, 303, 304, 305) which produces two identical substantially stepless symmetrical waveforms (preferably of triangular configuration) at a frequency which can b...  
WO/1983/001156A1
The electric machine according to the invention comprises an iron-free rotor provided with two windings (1, 2) each of them being formed by a plurality of coil elements (11, 12, 13 and 21, 22, 23). The elements (11, 12, 13) of the first ...  
WO/1983/000571A1
An adaptive motor pulsing apparatus (36) for a driven element (32) positioning system which divides the available time between recurring motor (36) on periods and motor (36) off periods, and which also varies the duty cycle of the motor ...  
WO/1982/002962A1
Microprocessor controlled micro-stepping chart drive circuit. The invention comprises a step clock system (10), a microprocessor controller (12) and a motor drive circuit (16). A speed selector (14) establishes a numerical constant withi...  
WO/1982/002127A1
A digital servo control system for a d.c. motor (20) to achieve stepping motor precision and a wider speed control range than either a conventional d.c. motor or a stepping motor, as may be typically utilized in an IV syring pump. Motor ...  
WO/1981/002207A1
This control device is used in connection with a motor comprising a magnetic rotor and at least two magnetic stator circuits coupled with respective coils (b1, b2). A logic circuit (21) is arranged to alternatively feed drive pulses to b...  
WO/1981/001084A1
A circuit arrangement for an asynchronous motor drive of controlled stepping, i.e. for control of the number of revolutions of asynchronous squirrel-cage motors, in which the output of the supply unit is connected to a potentiometer, the...  
WO/1980/002461A1
Electronic circuits mounted on printed circuit boards, particularly circuits used for television receivers, are placed on a palette which is transferred by a conveyer. During transfer, test probes check whether or not the necessary parts...  
WO/1980/002492A1
A driving apparatus for a plurality of pulse motors for simultaneously carrying out adjustments of a plurality of adjusting points which are interdependent. Driving devices (222X to 222Z) that are rotatably driven by a plurality of pulse...  
JP6494271B2  
JP6488603B2  
JP2019047559A
[Subject] Exact rotation detection is realized in an electronic timepiece and a rotation control device. [Means for Solution] A rotation child who has a magnet, and a stator provided with a coil for rotating a rotation child, Function 69...  
JP2019047536A
[Subject] It aims at providing the rotation detection method of the motor driving which can judge correctly whether the motor rotated normally based on the induction voltage which occurs by the induction current concerned, and motor driv...  
JP2019047722A
[Subject] In motor driving which generates an efficient drive waveform based on a rotation detection position, make possible little drive waveform generation of reaction delay, and control inversion operation of a motor at the time of vi...  
JP6486511B2  
JP2019041451A
[Subject] A Evacuation tone of a stepping motor is prevented beforehand, and provide a drive method of a motor drive unit which can carry out the high velocity revolution of the stepping motor, an image forming device, and a motor. [Mean...  
JP2019041536A
[Subject] Depending on a move state of a device or environment of a device which has a stepping motor, control of a stepping motor may not be performed appropriately. [Means for Solution] A control device controls a stepping motor. A con...  
JP6481715B2  
JP2019037087A
[Subject] A rotor's position is detected. [Means for Solution] According to one embodiment, it is a current detecting element of a rotor's position detection system, When the 1st and 2nd low side transistor of OFF and H bridged circuit t...  
JP2019037035A
[Subject] An impact noise by member turning is reduced, maintaining driving speed of member turning, such as a mirror. [Means for Solution] Motor 1 is equipped with magnetic sensor 8~11 which detects a rotation position of rotor 3, and c...  
JP2019035819A
[Subject] When driving a mirror on a lead screw, an imaging device which can shorten driving time of a mirror and can make top Fast quick is provided. [Means for Solution] An imaging device has follower 266 which engages with a lead slot...  
JP2019030033A
[Subject] Shortening of a period of Pre-hold is aimed at, reducing the danger of a Evacuation tone. [Means for Solution] A motor controlling device of an embodiment is provided with a motor driver and a motor control means. A motor drive...  
JP2019030038A
[Subject] A drive of a motor will become unstable when a drive system of a motor changes. [Means for Solution] Even if revolving speed omega_ref * changes from a value smaller than threshold omegath to a larger value than threshold omega...  
JP2019023630A
[Subject] It is comparatively realizable in a circuit of small size, and also to drive variation of change of battery voltage and gear load torque, while robustness is comparatively high and a setup of rotation detection of an easy rotor...  
JP2019022421A
[Subject] A stepping motor drive and a printer which can perform phase Matching of a stepping motor efficiently are provided. [Means for Solution] Synchronizing with a machinery angle of a stepping motor and the stepping motor, a current...  
JP2019022280A
[Subject] When Instantaneous interruption of a power supply occurs, a control device of a motor which can control initialization operation according to a position at that time is provided. [Means for Solution] A motor controlling device ...  
JP6465848B2  
JP6463595B2  
JP2019015867A
[Subject] When making an iris diaphragm drive and adjusting exposure in the case of animation photography, a control device which can raise the linearity of a luminance transition by drive of an iris diaphragm is provided. [Means for Sol...  
JP6456212B2  
JP6455247B2  
JP6456211B2  
JP6456210B2  
JP2018207733A
To solve such a problem that control of a motor becomes unstable, when control of the motor is started based on the initial phase, in a state where the determined initial phase and the actual rotary phase of a rotor are different.At firs...  
JP2018207607A
To suppress high frequency noise in micro step driving of a stepping motor.A motor control device 100 includes a H bridge circuit 20 and control means for driving a switching element of the H bridge circuit 20 with a PWM signal to set a ...  

Matches 301 - 350 out of 11,277